The Saudi index added 0.8 percent. Prince Mohammed said in a New York Times interview that about 95 percent of about 200 businessmen and officials implicated in the probe were agreeing to financial settlements of the charges against them - a possible indication the probe, which has unsettled the stock market, could start to wind down.

Al Tayyar Travel, whose founder has been detained in the crackdown, rebounded 6.4 percent. After plunging in the initial days after the probe was announced, it has been recovering in the last few days.

Insurer SABB Takaful gained 3.2 percent after Saudi British Bank said it had completed the purchase of all of HSBC's stake in SABB Takaful.

Thursday's announcement that the securities regulator would further ease requirements for foreign institutional investors in the stock market also buoyed the market.

Among other steps, the minimum value of assets under management needed for a foreign institution to qualify as an investor would fall to 1.875 billion riyals ($500 million) from 3.75 billion riyals.

Banque Saudi Fransi edged down 0.2 percent after the central bank said the bank faced an unspecified fine over irregularities in an employee incentive programme. The probe into the irregularities was already well-known and official action had been anticipated by investors.

In Abu Dhabi, the index edged down 0.1 percent but Manazel Real Estate, the most heavily traded stock, gained 1.9 percent after saying plans were underway to expand into Middle East and North African markets, including Saudi Arabia, because of rising demand for middle-income housing. It gave no details.

Dubai's index fell 0.3 percent in thin trade as Emaar Properties pulled back 0.8 percent. Its unit Emaar Development, which performed weakly on its debut last week, rose 0.5 percent.

In Kuwait, logistics firm Agility gained 3.0 percent after its 80.5 percent-owned unit Metal and Recycling Co reported quarterly profit more than doubled from a year earlier to 171,524 dinars ($570,000) as sales rose 15 percent.